I changed my site from HTML to PHP and I need to get some help.

[TrendyHost]

Ok...so the other day I went from HTML to PHP in every part of my website. I want to know the best option for me for redirecting my pages from HTML to php. I had my site scanned with SEOMoz and I was given many 404 errors which is not at all good.

I do not have any pages of my site linking to any of these html pages. All of the site links have been updated. I have checked 3 times.

I have never created a robots.txt file so I would love to get a little help with this part.

I was thinking it would be best to tell Google not to worry about these pages in the file.

I kept the pages up and I plan to remove all code with them so that no content shows up if someone visits but the issue with that is my site is already indexed as HTML.

I want to have the HTML pages redirect to the PHP without worrying that my visitors will land on my site via Google onto an HTML page.

I hope I am making sense.

What is the best advice you can give me. I need all pages to redirect to PHP.

I used an htaccess redirect from all HTML to PHP but when I get so many of them added I get an error on my site saying too many redirects.

Seriously need help.

[TrendyHost]

Will the SEOMoz.com team please answer this question. It is sort of important.

[CompleteOffice]

Why are you redirecting .html to .php why dont you just permanently change the endings of the pages to .php?

[TrendyHost]

I did that. I changed all my pages to php but my site is indexed in Google for HTML which when they land is not showing anymore because I deleted the .html files.

I need to know the right way to make google index my php pages in replace of the html.

I do not want to get penalized for dup content being that there is a about.php and about.html.

They both have the same content. I also do not want google to think the pages are gone and penalize me for missing or uncrawlable pages.